HBLDEFGHIKLM- ignorePlease answer the following questions, Write clearly as well and please as fast as possible. I willupvote.1. a) A typical washing machine has several different cycles, includingand rinse. Theenergy consumption of a washing machine is linked to the length of each cycle. A randomsample of 20 washing machines was obtained, and the length (in minutes) for each wash cyclewas recorded yielding a sample mean of 37.2 minutes and a sample standard deviation is 4.0minutes. Assume length of wash cycles is normally distributed. Find and interpret a 92%confidence interval for the true mean wash cycle time.b) Suppose a confidence interval constructed from this data was (34.929, 39.471) minutes. Whatconfidence level was used to produce this interval?

From the given information, it is assumed that: x¯ (sample mean wash cycle in minutes)=37.2s…

Answered: Please answer the following questions,…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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1a.calculate the i. mean ii. Mode
Question 4 a) A medical researcher wants to investigate the amount of time it takes for patients' headache pain to be relieved after taking a new prescription painkiller. She wants to estimate the mean of the population of relief times. She believes that the population is normally distributed with a population standard deviation of 25 minutes. How large a sample should she take to estimate the mean time to within 5 minutes with 95% confidence? b) An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential shortage of vaccines for the area. She will need to provide a recommendation for how to allocate the vaccines appropriately across the city. She takes a simple random sample of 320 people living in East Vancouver and finds that 40 have recently had the flu.Suppose that the epidemiologist wants to re-estimate the population proportion and wishes for her 95% confidence interval to have a margin of error no larger than 0.05. How large a sample should…
In a 2014 study, Michael Smith arranged to be stung by bees repeatedly on 25 locations over 38 days to record the relative pain experienced by each sting in each body area. A scale pain ratings of 1-10 were used with stings to the forearm defined to be a 5. What is the population of this study?
Please answer with explanation Thanks
QUESTION 4 A steel manufacturing company wishes to compare the strength of the wires produced by an existing and a new process. The manufacturer will use the existing process unless the inerease in the mean strength in the new process is significant The following data represents the strength of the steel wires made by the two processes: Process Strength of steel wires (megapascal, MPa) 1334 1330 13 10 1340 Existing 1365 1286 1320 1333 1300 1350 New 1300 1310 1340 1342 1390 1340 1350 Assuming that the strengths of the steel wire using the existing and new process are approximately normal a) Is there evidence that the steel manufacturing company should use the existing process to make the steel wires. Use the probability of Type I error at 0 01. Assume that the standard deviation does not change.
Please help with this question. Answer all parts please.
What is the correct answer?
Given mean = 50, median = 48 and coefficient of skewness = 1. Find the value of the variance
Please solve part c, d and e only. DO NOT SOLVE PART a AND b. I need answers for part c, part d and part e.
Joan's Nursery specializes in custom-designed landscaping for residential areas. The estimated labor cost associated with a particular landscaping proposal is based on the number of plantings of trees, shrubs, and so on to be used for the project. For cost-estimating purposes, managers use two hours of labor time for the planting of a medium-sized tree. Actual times from a sample of 10 plantings during the past month follow (times in hours). B, C, and D
Question 1: a) A medical researcher wants to investigate the amount of time it takes for patients' headache pain to be relieved after taking a new prescription painkiller. She wants to estimate the mean of the population of relief times. She believes that the population is normally distributed with a population standard deviation of 25 minutes. How large a sample should she take to estimate the mean time to within 5 minutes with 95% confidence? b) An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential shortage of vaccines for the area. She will need to provide a recommendation for how to allocate the vaccines appropriately across the city. She takes a simple random sample of 320 people living in East Vancouver and finds that 40 have recently had the flu.Suppose that the epidemiologist wants to re-estimate the population proportion and wishes for her 95% confidence interval to have a margin of error no larger than 0.05. How large a sample should…
QUESTION 2 An environmentalist wanted to determine if the mean acidity of rain differed among Ipoh, Johor Bahru and Kuantan. He randomly selected six rain dates at each city and obtained the following data: Table 2 Ipoh 5.10 5.00 4.91 5.12 4.78 5.20 Johor Bahru 4.80 4.15 4.42 4.65 4.87 4.10 Kuantan 5.45 6.23 5.55 5.10 5.42 5.25 Answer the following questions without using any output from any software. a) Construct a complete Analysis of Variance table. b) At <= 0.05, test whether the mean acidity of rain is different among the three cities. c) Based on the answer in (a) and (b), write a brief conclusion on the mean acidity of rain among Ipoh, Johor Bahru and Kuantan.

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